Chemistry

a carbon based compound reacts with oxygen to form carbon dioxide,co2,and water

14.

p1x v1=p2xv2

15.

single element replaces another element in a compound

17.

substance are made of one kind of atom

19.

electrons in the outer shell

21.

p1/t1=p2/t2

22.

p1x v1/t1=p2xv2/t2

23.

2 or more substances combine to form a single substance

24.

negatively charged ions

Down

2.

number of protons in an atom

4.

positively charged ions

5.

he drew the first periodic table

6.

rv=rnt

7.

a single compound breaks down in 2 or more simpler substances

10.

high melting point

11.

the cations and anions of 3 different compounds switch places

12.

low melting point

16.

tiny structures that make up all matter

18.

elements that have characteristics of both metals and non metals

20.

negatively charged part in the atom

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